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BL1587

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BL(Shanghai Belling) RS-485/RS-422 ICs, SOP-8. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

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BL1587

BL(Shanghai Belling) · RS-485/RS-422 ICs · SOP-8

BL1587 from BL(Shanghai Belling), in a SOP-8. Pinout and pin descriptions extracted from the manufacturer datasheet (extract_pins, cross-checked by a second model); symbol, footprint, and 3D from KiCad-official CAD.

Pinout

Pin Name Type Function
1 RO output Receiver output; active when /RE is low, high-impedance when /RE is high.
2 /RE input Receiver output enable; RO is active when /RE is low and high-impedance when /RE is high (input range -0.3 V to VCC+0.3 V).
3 DE input Driver output enable; driver outputs are active when DE is high and high-impedance when DE is low (input range -0.3 V to VCC+0.3 V).
4 DI input Driver input; high on DI gives A high/B low, low gives A low/B high (input range -0.3 V to VCC+0.3 V).
5 GND power_in Ground.
6 A bidirectional Receiver non-inverting input and driver non-inverting output; rated ±13 V.
7 B bidirectional Receiver inverting input and driver inverting output; rated ±13 V.
8 VCC power_in Power supply, +5 V operation (4.5 V to 5.5 V), absolute maximum +7 V.

Key specifications

Parameter Value
Manufacturer BL(Shanghai Belling)
Package SOP-8
Category Interface ICs
Pins 8

Electrical characteristics

Limits as printed in the datasheet (page.json metadata.characteristics carries them as data).

Parameter Symbol Min Typ Max Unit Conditions Page
Supply voltage (absolute maximum) VCC 7 V 3
Control input voltage /RE, DE -0.3 V -0.3 to VCC+0.3 3
Driver input voltage DI -0.3 V -0.3 to VCC+0.3 3
Driver output voltage A, B -13 13 V 3
Receiver input voltage A, B -13 13 V 3
Receiver output voltage RO -0.3 V -0.3 to VCC+0.3 3
Operating temperature range -40 85 °C 3
Operating voltage VCC 4.5 5.5 V TA=-40~+85°C 3
Differential driver output (no load) VOD1 5 V Figure 1; printed as VCC 3
Differential driver output VOD2 1.5 2.1 V VCC=5V, Figure 1, R=27Ω 3
Change in magnitude of VOD ΔVOD 0.2 V Figure 1, R=27Ω 3
Driver common-mode output voltage VOC 1 3 V Figure 1, R=27Ω 3
Change in magnitude of VOC ΔVOC 0.2 V Figure 1, R=27Ω 3
Input high voltage VIH 2 V DE,DI,/RE 3
Input low voltage VIL 0.8 V DE,DI,/RE 3
DI input hysteresis VHYS 100 mV 3
Input current (A,B) at VIN=12V IIN4 220 µA DE=GND, VCC=GND or 5.25V, VIN=12V 3
Input current (A,B) at VIN=-7V IIN4 -120 µA DE=GND, VCC=GND or 5.25V, VIN=-7V 3
Driver short-circuit output current IOSD -100 100 mA A Pin Short to B Pin 3
Receiver differential threshold voltage VTH -200 -125 -50 mV -7V≤VCM≤12V 3
Receiver input hysteresis ΔVTH 40 mV 4
Receiver output high voltage VOH 4 V IO=-8mA, VID=-50mV 4
Receiver output low voltage VOL 0.4 V IO=8mA, VID=-200mV 4
Receiver three-state output current IOZR -1 1 µA 4
Receiver input resistance RIN 48 kΩ -7V≤VCM≤12V 4
Receiver output short-circuit current IOSR 7 95 mA 0V≤VRO≤VCC; printed ±7 to ±95 4
Supply current, DE=VCC ICC 900 µA No load, /RE=DI=GND or VCC, DE=VCC 4
Supply current, DE=GND ICC 900 µA No load, /RE=DI=GND or VCC, DE=GND 4
Shutdown supply current ISHDN 10 µA DE=GND, /RE=VCC, DI=VCC or GND 4
Driver propagation delay low-to-high tDPLH 13 ns Fig 3 and 5, RDIFF=54Ω, CL1=CL2=100pF 4
Driver propagation delay high-to-low tDPHL 17 ns Fig 3 and 5, RDIFF=54Ω, CL1=CL2=100pF 4
Driver output skew tDSKEW 5 ns Fig 3 and 5, RDIFF=54Ω, CL1=CL2=100pF 4
Driver rise/fall time tDR, tDF 8 ns Fig 3 and 5, RDIFF=54Ω, CL1=CL2=100pF 4
Maximum data rate FMAX 2 Mbps 4
Driver enable to output high tDZH 20 ns Fig 4 and 6, CL=100pF, S2 Closed 4
Driver enable to output low tDZL 28 ns Fig 4 and 6, CL=100pF, S1 Closed 4
Driver disable time from low tDLZ 19 ns Fig 4 and 6, CL=15pF, S1 Closed 4
Driver disable time from high tDHZ 16 ns Fig 4 and 6, CL=15pF, S2 Closed 4
Receiver input to output delay tRPLH, tRPHL 42 ns Fig 7 and 9; rise and fall time of VID≦15ns 4
Receiver propagation delay difference tRSKD 5 ns Fig 7 and 9; rise and fall time of VID≦15ns 5
Receiver enable to output low tRZL 10 ns Fig 2 and 8, CRL=15pF, S1 Closed 5
Receiver enable to output high tRZH 45 ns Fig 2 and 8, CRL=15pF, S2 Closed 5
Receiver disable from low tRLZ 10 ns Fig 2 and 8, CRL=15pF, S1 Closed 5
Receiver disable from high tRHZ 45 ns Fig 2 and 8, CRL=15pF, S2 Closed 5
Shutdown time tSHDN 100 ns 5
Driver enable from shutdown to output high tDZH(SHDN) 1600 ns Fig 4 and 6, CL=100pF, S2 Closed 5
Driver enable from shutdown to output low tDZL(SHDN) 1600 ns Fig 4 and 6, CL=100pF, S1 Closed 5
Receiver enable from shutdown to output high tRZH(SHDN) 1500 ns Fig 2 and 8, CRL=15pF, S2 Closed 5
Receiver enable from shutdown to output low tRZL(SHDN) 2300 ns Fig 2 and 8, CRL=15pF, S1 Closed 5

CAD (KiCad official)

  • Symbol: BL1587
  • Footprint: Package_SO:SOIC-8_3.9x4.9mm_P1.27mm
  • 3D model: SOP-8 (KiCad packages3D, STEP)
  • 3D model files: bl1587-etched.step / bl1587-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); bl1587.step / bl1587.glb are the bare package body.

Provenance

Data extracted from the manufacturer datasheet, not a distributor listing:

  • Datasheet: BL(Shanghai Belling) datasheet (8 pp, sha256 309a5483ffd8b3e3, retrieved 2026-10-22, tier: lcsc)
  • Datasheet language: Chinese. Pin names, descriptions, and specs on this page were extracted and translated to English by ds2sf; the linked PDF is the manufacturer original.
  • Extractor: parts-factory 2.0.0 / extract_pins 0.3, primary claude-sonnet-5-5 (text), consensus claude-sonnet-5-5 (agreed), guards: pin_guards 0.1: passed. Pins are checked against the footprint pad set and their cited datasheet pages before publish.
  • CAD: KiCad official libraries (CC-BY-SA 4.0).

Datasheet PDF